rustc-ap-rustc_cratesio_shim 290.0.0

Automatically published version of the package `rustc_cratesio_shim` in the rust-lang/rust repository from commit 9c304fb0cf7328b570b5696c9b486268a0828563 The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish